Ever since the worm started hitting the net a couple weeks ago, it has taken several days for messages to the mailing list to get sent out. This is deadly to a Free Software project; really puts a crimp in things.
I read the Mailman FAQ and found the following thing, which may well speed up message delivery and solve peoples complaints:
Q. I'm getting really terrible performance for outgoing messages. It seems that if the MTA has trouble resolving DNS for any recipients, qrunner just gets really slow clearing the queue. Any ideas?
A. What's likely happening is that your MTA is doing DNS resolution on recipients for messages delivered locally (i.e. from Mailman to your MTA via SMTPDirect.py). This is a Bad Thing. You need to turn off synchronous DNS resolution for messages originating from the local host.
In Exim, the value to edit is receiver_verify_hosts. See
README.EXIM for details. Other MTAs have (of course) different
parameters and defaults that control this. First check the README
file for your MTA and then consult your MTA's own documentation.
I checked in /etc/exim/exim.conf on savannah.nongnu.org. There is NO setting for the receiver_verify_hosts variable. I am guessing that it is defaulting to an undesired setting.
Of course, I understand that the GNU mail servers are still especially hard hit by the worm; my own tiny mail server at home still has a score of messages stuck in the queue waiting to be rejected.
I hope this can get fixed soon.
Jonathan
--
It's not true unless it makes you laugh, but you don't understand it until it makes you weep.
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